359 / | HD | OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS |
577 | DF | LIGHT INTERFERENCE {2} |
580 | DF | .~ Produced by coating or lamina {7} |
586 | .~.~ Layers having specified index of refraction {2} | |
587 | DF | .~.~.~> Plural layer groups lateral in parallel light paths |
588 | DF | .~.~.~> Filter having four or more layers |